Time-dependent element, physical property temporal change prediction device, and electric circuit breaker

Abstract

A time-dependent element of the present invention includes a time-dependent phase transition material that undergoes solid-solid phase transition developing with time after production irrespective of the presence of an external stimulus, in which one or more physical properties of the time-dependent element selected from a group consisting of composition, volume, transmittance, reflectance, electric resistance, and magnetic property change with time. A physical property temporal change prediction device includes a physical property temporal change prediction device body having the time-dependent element and is configured to predict a temporal change in one or more physical properties selected from a group consisting of composition, volume, transmittance, reflectance, electric resistance, and magnetic property.

1 . A time-dependent element, comprising
 a time-dependent phase transition material that undergoes solid-solid phase transition developing with time after production irrespective of the presence of an external stimulus, wherein   one or more physical properties of the time-dependent element selected from a group consisting of composition, volume, transmittance, reflectance, electric resistance, and magnetic property change with time; and   the time-dependent phase transition material is composed of trititanium pentoxide including crystal grains of at least λ-phase trititanium pentoxide (λ-Ti 3 O 5 ).   
     
     
         2 - 9 . (canceled) 
     
     
         10 . The time-dependent element according to  claim 1 , wherein
 the time-dependent phase transition material is composed of trititanium pentoxide including crystal grains of λ-phase trititanium pentoxide (λ-Ti 3 O 5 ) and β-phase trititanium pentoxide (β-Ti 3 O 5 ).   
     
     
         11 . The time-dependent element according to  claim 1 , wherein
 the time-dependent phase transition material includes crystal grains of β-phase trititanium pentoxide (β-Ti 3 O 5 ) and λ-phase trititanium pentoxide (λ-Ti 3 O 5 ) at lower than 350° C. and has the property that at least a portion of crystal grains of β-phase trititanium pentoxide (β-Ti 3 O 5 ) and λ-phase trititanium pentoxide (λ-Ti 3 O 5 ) change into crystal grains of titanium dioxide (TiO 2 ) when the time-dependent phase transition material is heated to 350° C. or higher.   
     
     
         12 . A physical property temporal change prediction device, comprising a physical property temporal change prediction device body including a time-dependent element according to  claim 1 , wherein
 the physical property temporal change prediction device predicts a temporal change in one or more physical properties selected from a group consisting of composition, volume, transmittance, reflectance, electric resistance, and magnetic property.   
     
     
         13 . The physical property temporal change prediction device according to  claim 1 , wherein the physical property temporal change prediction device is composed of a card body. 
     
     
         14 . An electric circuit breaker, comprising a physical property temporal change prediction device according to  claim 1 , wherein
 the electric circuit breaker predicts a temporal change in the electric resistance.   
     
     
         15 . An electric circuit breaker, comprising a physical property temporal change prediction device according to  claim 1 , wherein
 the electric circuit breaker predicts a temporal change in the volume.